<template>
  <div :class="className" :style="{height:height,width:width,padding:padding}" />
</template>

<script>
import echarts from "echarts";
require("echarts/theme/macarons"); // echarts theme
import resize from "./mixins/resize";

export default {
  mixins: [resize],
  props: {
    cdata: {
      type: Object,
      default: () => ({})
    },
    className: {
      type: String,
      default: "chart"
    },
    width: {
      type: String,
      default: "100%"
    },
    height: {
      type: String,
      default: "300px"
    },
    padding: {
      type: String,
      default: "0px"
    }
  },
  data() {
    return {
      chart: null,
      options: {}
    };
  },
  // 监听cdata异步加载
  watch: {
    cdata: {
      handler(newData) {
        // 设置option
        this.setOpt(newData);
        // 重新渲染， true是清除旧数据
        this.chart.setOption(this.options, true);
      },
      deep: true
    }
  },
  mounted() {
    this.initChart();
  },
  beforeDestroy() {
    if (!this.chart) {
      return;
    }
    this.chart.dispose();
    this.chart = null;
  },
  methods: {
    // 初始化echart
    initChart() {
      this.chart = echarts.init(this.$el, "macarons");
      this.chart.setOption(this.options, true);
    },
    // 设置option
    setOpt(newData) {
      this.options = {
        
        tooltip: {
          trigger: "item",
          formatter: "{a} <br/>{b} : {c} ({d}%)"
        },
        legend: {
          left: "center",
          bottom: "10",
          data: newData.xData
        },
        series: [
          {
            top: 20,
            name: newData.seriesName,
            type: "pie",
            center: ["50%", "38%"],
            data: newData.seriesData,
            animationEasing: "cubicInOut",
            animationDuration: 2600
          }
        ]
      };
    }
  }
};
</script>
